This can be proven for any valid argument form using a truth table which shows that there is no situation in which there are all true premises and a false conclusion.
Founded in 1994, IntraLearn Software Corporation (ISC) is a pioneer of creating e-Learning and Knowledge Organization products for corporate enterprises, academic institutions, associations, government agencies and training suppliers.
By 1963 CSC became the largest software company in the United States and the first software company to be listed on the American Stock Exchange. By the end of 1968, CSC was listed on the New York Stock Exchange and had operations in Canada, India, the United Kingdom, Germany, Spain, Italy, Brazil, and the Netherlands.